57056865 has 16 divisors (see below), whose sum is σ = 92655168. Its totient is φ = 29975616.

The previous prime is 57056851. The next prime is 57056887. The reversal of 57056865 is 56865075.

It is not a de Polignac number, because 57056865 - 2⁸ = 57056609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27382 + ... + 29391.

It is an arithmetic number, because the mean of its divisors is an integer number (5790948).

Almost surely, 2^57056865 is an apocalyptic number.

It is an amenable number.

57056865 is a deficient number, since it is larger than the sum of its proper divisors (35598303).

57056865 is a wasteful number, since it uses less digits than its factorization.

57056865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56848.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 57056865 is about 7553.5994730989. The cubic root of 57056865 is about 384.9780501344.

The spelling of 57056865 in words is "fifty-seven million, fifty-six thousand, eight hundred sixty-five".